aFe Power 46-70020 Ford&nbsp;F-250/F-350/Excursion Rear Differential Cover (Raw;&nbsp;Street Series) Has about a 5 quart lube capacity at the factory line, factory cover holds about 4 quarts Constructed out of durable A380 die-cast aluminum with reinforced ribs and machined fins Built-in deep reach internal and external fins, magnetic drain plug and large oil level sight glass with calibration plug set to the factory fluid level Fits Ford F-250/F-350/Excursion 10.25 & 10.50-12 Bolt Axles Includes a fully machined groove to accept supplied O-ring for a leak free seal